I've done the list of things below:
Calls to T1/T2 officers
Service request for EAD
Ombudsman Request
Sent messages on USCIS online inbox system,
Contacted Nebraska Service Center
Requested NILC to flag my case
Requested ILRC to elevate my case
And .......Nothing!!!!
__________________
Application Sent - 05/11/2016 to Chicago Lockbox
Date of I-797 C Notice of Action - 05/12/2016
Date of Biometrics Appointment - Received 06/02/2016 for 06/23/2016 Walk- in on 06/13
Approved :9/17/2016
EAD:10/7/2016